Malicious PDF — malware analysis report

Static analysis result for SHA-256 f926919c092ee71f…

MALICIOUS

PDF

68.0 KB Created: 2021-09-25 15:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6db91de24560a5ef396d5b90a679910b SHA-1: 3a3087a6c4f5647cb93b85622793449c84f37617 SHA-256: f926919c092ee71f0a81204f2abd248c7adccacabf2d9385fc8bc53993c66188
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to conceal clickable links. The numerous extracted URLs, many hosted on compromised WordPress sites or disposable domains, suggest an attempt to redirect users to malicious content or phishing pages. The PDF_IMAGE_LURE heuristic further supports the conclusion that this is a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=soccer+manager+2016+apk PDF link annotation
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/47229317041.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/midizarad.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/jixixitujox.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138ab7d32b33---21449027578.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/76526598639.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/90676628546.pdfIn PDF document text
    • https://miet.hu/kepek/manew.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/rojinixazezagijaliredafev.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/vojivuzipitidupevajam.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/vaniga.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/57825946179.pdfIn PDF document text
    • https://bursac.net/userfiles/file/lafitatuxetuzazazunakuw.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300423a2a7d---39344136701.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/66579108163.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/kopulilep.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/zugefopezitemaligaxa.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/11439917953.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/75717227482.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d09c08827d---76120552430.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/ladulexogixusosisugaze.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/44144013884.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ihcs3mie9keqm5adq5e0t6t4f6/kobopu.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/33151967144.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/tenifijuwazi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0F 14208 bytes
SHA-256: 7a0e39139340e3c5cc201f2a72c2b14c13e86c78ff3b83cd48d8244c65d46447
font_01_sfnt_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 10940 bytes
SHA-256: b123f756635d693914e7b15adaba815aab8ae91661d8c79b91b2c8bada0949ca

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